docs: def reverb(self,
                 reverberance=50,
                 hf_damping=50,
                 room_scale=100,
                 stereo_depth=100,
                 pre_delay=20,
                 wet_gain=0,
                 wet_only=False):
          """reverb takes 7 parameters: reverberance, high-freqnency damping,
          room scale, stereo depth, pre-delay, wet gain and wet only (Truce or
          False)"""
          self.command.append('reverb')
          if wet_only:
              self.command.append('-w')
          self.command.append(reverberance)
          self.command.append(hf_damping)
          self.command.append(room_scale)
          self.command.append(stereo_depth)
          self.command.append(pre_delay)
          self.command.append(wet_gain)
          return self